Nevin Manimala

Mol Ecol Resour. 2022 Aug 30. doi: 10.1111/1755-0998.13706. Online ahead of print.

ABSTRACT

Despite the popularity of discriminant analysis of principal components (DAPC) for studying population structure, there has been little discussion of best practise for this method. In this work, I provide guidelines for standardising the application of DAPC to genotype datasets. An often-overlooked fact is that DAPC generates a model describing genetic differences among a set of populations defined by a researcher. Appropriate parameterisation of this model is critical for obtaining biologically meaningful results. I show that the number of leading PC axes used as predictors of among population differences, p_axes , should not exceed the k – 1 biologically informative PC axes that are expected for k effective populations in a genotype dataset. This k – 1 criterion for p_axes specification is more appropriate compared to the widely used proportional variance criterion, which often results in a choice of p_axes ≫ k – 1. DAPC parameterised with no more than the leading k – 1 PC axes: (1) is more parsimonious; (2) captures maximal among-population variation on biologically relevant predictors; (3) is less sensitive to unintended interpretations of population structure; and (4) is more generally applicable to independent sample sets. Assessing model fit should be routine practise and aids interpretation of population structure. It is imperative that researchers articulate their study goals, that is, testing a priori expectations versus studying de novo inferred populations, because this has implications on how their DAPC results should be interpreted. The discussion and practical recommendations in this work provide the molecular ecology community a roadmap for using DAPC in population genetic investigations.

PMID:36039574 | DOI:10.1111/1755-0998.13706

J Osteopath Med. 2022 Aug 30. doi: 10.1515/jom-2022-0016. Online ahead of print.

ABSTRACT

CONTEXT: With the surge of the novel coronavirus (SARS-CoV-2 [COVID-19]), the modality of teaching anatomy has shifted from in-person cadaveric dissection to virtual lessons for incoming first-year medical students. As a result, we aim to assess the impact that this curriculum change has on student perspectives.

OBJECTIVES: This study aims to understand the relative effect of a virtual anatomy course implemented during the pandemic (2019-2020) on the confidence, skills, and perspectives of first-year medical students compared to medical students who had traditional in-person anatomy at Rowan University School of Osteopathic Medicine (Rowan SOM) in Stratford, New Jersey.

METHODS: The authors developed a 14-question survey to target gross anatomy students of the Classes of 2023 and 2024 at Rowan SOM. The Class of 2024 had a virtual anatomy lab compared to the Class of 2023, who had an in-person anatomy lab in their first year of medical school. The responses were analyzed to understand the difference between a hands-on cadaver lab and a virtual anatomy lab utilizing SPSS.

RESULTS: The survey was administered to approximately 400 people, from which we received 149 responses (37.3%). Among all responses, 36.2% (n=54) belonged to the Class of 2023 who encountered hands-on cadaver experience, whereas 63.8% (n=95) belonged to the Class of 2024 who gained virtual anatomy lab experience. An independent t-test statistical analysis was utilized. Under the confidence domain, when students were asked about the understanding of trauma after their respective anatomy labs, 64.0% of the Class of 2023 (n=50) showed significantly higher confidence with p<0.001, compared to 15.4% for the Class of 2024 (n=78). Under the skills domain, the Class of 2023 (n=50) felt more comfortable with ultrasound (64.0%), identifying all of the pertinent anatomical structures and their respective locations on imaging (72.0%), and identifying the pathology (90.0%) with respective p values of <0.001, <0.001, and 0.004. Only 36.9% of Class of 2024 respondents shared similar comfort with ultrasound (n=84), 30.9% identifying pertinent anatomical structures (n=84) and 65.4% in identifying pathology (n=84). Under the attitude domain, the Class of 2023 (n=50) had more respect toward the human body with their hands-on cadaver experience (88.0%) than the Class of 2024 (n=89, 33.3%).

CONCLUSIONS: Based on current results, it can be established that medical students who had in-person cadaveric dissection had a favorable attitude toward their anatomy course compared to students who had virtual anatomy during the COVID-19 pandemic.

PMID:36039567 | DOI:10.1515/jom-2022-0016

Int J Rheum Dis. 2022 Aug 30. doi: 10.1111/1756-185X.14431. Online ahead of print.

ABSTRACT

AIM: The current study was undertaken to evaluate the influence of breastfeeding on the development and outcome measures of juvenile idiopathic arthritis (JIA). The second aim was to determine the consequences of particular sociodemographic and sociocultural characteristics and nutritional behavior of early childhood on JIA.

METHODS: The study includes the patients diagnosed with JIA and regularly followed up at the Department of Pediatric Rheumatology in Istanbul University-Cerrahpasa. The comparison group consisted of healthy subjects and patients with juvenile systemic lupus erythematosus (jSLE). A face-to-face survey method was conducted with the parents of the participants between February 1, 2021, and September 1, 2021.

RESULTS: The mean age of the JIA cohort (n = 324) was 12.2 ± 4.7 years, with a female ratio of 64.8%. The breastfeeding rate differed from the control groups (253 healthy subjects and 88 patients with jSLE) but was higher with a value of 94.8%. There was no difference between the groups (P = .097, P = .064) or within the subgroups of JIA (P = .12) regarding breastfeeding duration. Cow’s milk introduction time (P = .02, P = .0001), household pet-keeping (P = .001), income level (P = .0001), maternal literacy (P = 0.013) made a statistical difference vs the control groups.

CONCLUSION: No relationship was established between the rate or duration of breastfeeding and the development or severity of JIA. The early introduction of cow’s milk was found to be higher in the patient cohorts. The income level and maternal literacy appeared to be relevant with the high disability and damage scores, and frequent relapse rates. Secondhand smoking, higher in JIA, may prompt the basis of primary preventable strategies in JIA.

PMID:36039559 | DOI:10.1111/1756-185X.14431

Psychiatr Serv. 2022 Aug 30:appips202100629. doi: 10.1176/appi.ps.202100629. Online ahead of print.

ABSTRACT

The U.S. Veterans Health Administration developed a suicide prediction statistical model and implemented a novel clinical program, Recovery Engagement and Coordination for Health-Veterans Enhanced Treatment (REACH VET). This high-value suicide prevention program aims to efficiently identify patients at risk and connect them with care. Starting in April 2017, national REACH VET metric data were collected from electronic health records to evaluate required task completion. By October 2020, 98% of veterans identified (N=6,579) were contacted by providers and had their care evaluated. In the nation’s largest health care system, it was feasible to implement a clinical program based on a suicide prediction model.

PMID:36039552 | DOI:10.1176/appi.ps.202100629

Brain Behav. 2022 Aug 30:e2745. doi: 10.1002/brb3.2745. Online ahead of print.

ABSTRACT

OBJECTIVE: The present study aimed to examine the effect of group assertive training on self-esteem and quality of life among spouses of drug-abusing patients.

METHODS: This randomized clinical trial assignment study with a control group. The statistical population included all spouses of drug users referring to private addiction treatment centers in Tehran-Iran in 2020 and the sample included 50 spouses of drug users who were selected by simple random sampling from among the volunteers. They were randomly divided into two groups control and experimental, each group consisting of 25 people.

RESULTS: The results of data analysis showed that group assertive training increased self-esteem and quality of life in spouses of drug-abusing patients in the experimental group compared to the witness group (p < .001).

CONCLUSION: As a result, group assertive training is effective in increasing the self-esteem and quality of life among the spouses of drug-abusing patients.

PMID:36039547 | DOI:10.1002/brb3.2745

Stat Methods Med Res. 2022 Aug 30:9622802221122423. doi: 10.1177/09622802221122423. Online ahead of print.

ABSTRACT

In clinical and public health studies, it is often the case that some variables relevant to the analysis are too difficult or costly to measure for all individuals in the population of interest. Rather, a subsample of these individuals must be identified for additional data collection. A sampling scheme that incorporates readily-available information for the entire target population at the design stage can increase the statistical efficiency of the intended analysis. While there is no universally optimal sampling design, under certain principles and restrictions, a well-designed and efficient sampling strategy can be implemented. In two-phase designs, efficiency can be gained by stratifying on the outcome and/or auxiliary information that is known at phase I. Additional gains in efficiency can be obtained by determining the optimal allocation of the sample sizes across the strata, which depends on the quantity that is being estimated. In this paper, the inference is concerned with one or multiple regression parameter(s) where the study units are naturally clustered and, thus, exhibit correlation in outcomes. We propose several allocation strategies within the framework of two-phase designs for the estimation of the regression parameter(s) obtained from weighted generalized estimating equations. The proposed methods extend existing theory to address the objective of the estimating regression parameters in cluster-correlated data settings by minimizing the asymptotic variance of the estimator subject to a fixed sample size. Through a comprehensive simulation study, we show that the proposed allocation schemes have the potential to yield substantial efficiency gains over alternative strategies.

PMID:36039539 | DOI:10.1177/09622802221122423

Prog Transplant. 2022 Aug 30:15269248221122897. doi: 10.1177/15269248221122897. Online ahead of print.

ABSTRACT

Introduction: Pain following donor nephrectomy for living kidney donation is common. In Israel, non-directed, altruistic donations account for 45% of all kidney transplants. Design: This cross-sectional, retrospective survey included 2 groups of donors derived from the data of Israel Transplant, namely directed and non-directed, altruistic donors, who donated between 2015 to 2018. The degree of recalled pain memory post-surgery was assessed using the Visual Analog Scale at 5 time points: immediately post-surgery, after 1 week, 1 month and 3 months post-surgery and in the month preceding completion of the questionnaire. In addition, continued requirement for analgesics for more than one-month post-surgery, the degree of interference with daily activities in the month preceding the questionnaire and the recalled time to return to full-time employment were also noted. Results: In total, 246 (131 directed and 115 non-directed, altruistic) donors were included in the study. Non-directed, altruistic donors reported statistically significantly lower degrees of recalled pain memory at all time points, a lower requirement for prolonged analgesic use and less recalled interference with daily activities due to pain. In addition, these donors recalled returning significantly earlier to full-time employment. Finally, no significant differences in the degree of recalled pain memory were noted for directed donors according to their relation to the recipient, apart from donation to a spouse. Conclusion: These unique findings, if validated in a prospective study, could provide important information to potential non-directed, altruistic donors regarding the expected level of post-surgical pain and their return to full-time employment.

PMID:36039525 | DOI:10.1177/15269248221122897

Prog Transplant. 2022 Aug 29:15269248221122867. doi: 10.1177/15269248221122867. Online ahead of print.

ABSTRACT

Introduction: Given the negative outcomes associated with uncontrolled diabetes mellitus, non-insulin therapies with glycemic, cardiovascular, and weight-loss benefits in the general population, such as the glucagonlike peptide-1 receptor agonists (GLP1-RA) have become a more alluring therapeutic option in transplant populations. However, limited evidence exists to demonstrate its safety and efficacy in solid organ transplant. Methods: This program evaluation included adult kidney, liver, lung transplant recipients initiated on a GLP1-RA for diabetes mellitus management for a minimum of 3 months, had at least one follow-up visit after starting therapy, and had at least one hemoglobin A1c (HbA1c) level drawn between 3-12 months after GLP1-RA initiation. Outcomes were assessed at time of initiation of GLP1-RA (baseline) and 3-12 months post-initiation. Nadir values between 3-12 months were utilized to assess outcomes. Results: One-hundred eighteen patients met study inclusion criteria. Seventy-percent of patients received a kidney transplant, 19.5% received a liver transplant, and 6.8% received a lung transplant. A statistically significant difference was observed in median fasting blood glucose and HbA1c at baseline to 3-12-month nadir (P < 0.0001). A significant weight loss benefit was also observed. The rate of adverse drug reactions was low. Seven-percent of patients experienced nausea, 4.2% developed pancreatitis, and 7.1% reported having had at least one hypoglycemic event. Discussion: This is the largest study evaluating GLP1-RA in organ transplantation and demonstrates GLP1-RA is both safe and effective. Further assessment on long-term use of these agents on cardiovascular and renal outcomes is still needed.

PMID:36039519 | DOI:10.1177/15269248221122867

JMIR Public Health Surveill. 2022 Aug 29;8(8):e25735. doi: 10.2196/25735.

ABSTRACT

BACKGROUND: Effective health policy formulation requires sound information of the numerical data and causes of deaths in a population. Currently, in Bangladesh, neither births nor deaths are fully and promptly registered. Birth registration in Bangladesh is around 54% nationally. Although the legal requirements are to register within 45 days of an event, only 4.5% of births and 35.9% of deaths were reported within the required time frame in 2020. This study adopted an innovative digital notification approach to improve the coverage of registration of these events at the community level.

OBJECTIVE: Our primary objective was to assess (1) the proportion of events identified by the new notification systems (success rate) and the contribution of the different notifiers individually and in combination (completeness) and (2) the proportion of events notified within specific time limits (timeliness of notifications) after introducing the innovative approach.

METHODS: We conducted a pilot study in 2016 in 2 subdistricts of Bangladesh to understand whether accurate, timely, and complete information on births and deaths can be collected and notified by facility-based service providers; community health workers, including those who routinely visit households; local government authorities; and key informants from the community. We designed a mobile technology-based platform, an app, and a call center through which the notifications were recorded. All notifications were verified through the confirmation of events by family members during visits to the concerned households. We undertook a household survey-based assessment at the end of the notification period.

RESULTS: Our innovative system gathered 13,377 notifications for births and deaths from all channels, including duplicate reports from multiple sources. Project workers were able to verify 92% of the births and 93% of the deaths through household visits. The household survey conducted among a subsample of the project population identified 1204 births and 341 deaths. After matching the notifications with the household survey, we found that the system was able to capture over 87% of the births in the survey areas. Health assistants and family welfare assistants were the primary sources of information. Notifications from facilities were very low for both events.

CONCLUSIONS: The Global Civil Registration and Vital Statistics: Scaling Up Investment Plan 2015-2024 and the World Health Organization reiterated the importance of building an evidence base for improving civil registration and vital statistics. Our pilot innovation revealed that it is possible to coordinate with the routine health information system to note births and deaths as the first step to ensure registration. Health assistants could capture more than half of the notifications as a stand-alone source.

PMID:36036979 | DOI:10.2196/25735

Dermatol Surg. 2022 Aug 23. doi: 10.1097/DSS.0000000000003544. Online ahead of print.

ABSTRACT

BACKGROUND: Aesthetic procedures are widely performed by dermatologists and plastic surgeons, often with subjective results. In cosmetic dermatology, there is a lack of studies that use accurate instruments to assess result outcomes. Quality of life (QoL) questionnaires can objectively assess results.

OBJECTIVE: To assess the impact of nonsurgical facial cosmetic procedures on QoL.

MATERIALS AND METHODS: This was a longitudinal observational study performed with 81 patients who underwent facial cosmetic procedures at a University Hospital in Rio de Janeiro, Brazil. The Skin Rejuvenation Outcome Evaluation questionnaire, previously adapted and translated to the Portuguese language spoken in Brazil, was selected, and the results were compared with the Dermatology Life Quality Index. The impact on QoL was statistically evaluated after the interventions.

RESULTS: The Skin Rejuvenation Outcome Evaluation scores after the procedures were significantly higher than before (p < .001), independent of sociodemographic characteristics. Patients treated with botulinum toxin and dermal fillers showed greater satisfaction than those treated with laser, chemical peels or microneedling.

CONCLUSION: Minimally invasive cosmetic procedures result in improvements in QoL. The use of translated, adapted, and validated questionnaires favors the comparison of results among different populations and reinforces the confidence on the results of established cosmetic treatments.

PMID:36036975 | DOI:10.1097/DSS.0000000000003544